【作者】 刘云； 吴平霄； 唐剑文； 曾少雁；

【Author】 LIU Yun, WU Ping-xiao, TANG Jian-wen, ZEN Shao-yan College of Environmental Science & Engineering, South China University of Technology, Guangzhou 510640, China

【机构】 华南理工大学环境科学与工程学院；

【摘要】 利用keggin离子对蒙脱石进行柱撑制得聚羟基铝柱撑蒙脱石,研究柱撑蒙脱石对Cu²⁺,Cd²⁺,Cr³⁺3种重金属离子的吸附。结果表明:未经焙烧的柱撑蒙脱石对Cu²⁺,Cr³⁺离子的吸附性要比原矿好,而经400C下焙烧的柱撑蒙脱石对Cd²⁺则有更好的吸附性。用腐殖酸对柱撑蒙脱石改性能提高柱撑蒙脱石对3种重金属离子的吸附性能,柱撑蒙脱石对3种重金属离子的吸附量都随pH值的升高而增加。另外还时柱撑蒙脱石对3种重金属离子的吸附动力学进行了研究,发现其动力学吸附过程可用Elovicb方程和一级动力学方程进行较好的拟合。更多还原

【Abstract】 In this paper, the hydroxyl-Al pillared montmorillonite was prepared by Al³⁺ in keggin ions and the adsorption of Cu²⁺ ,Cd²⁺ ,Cr³⁺ on the hydroxyl-Al pillared montmorillonite was studied, it shows that hydroxyl-Al pilled montmorillonite which was not calcined has higher adsorption capacity than unpillared montmorillonite, while the hydroxyl-Al pillared montmorillonite calcined at 400 C has high adsorption capacity than Cd²⁺. The study also shows that humic acid can modify the hydroxyl-Al pillared montmorillonite and improve its adsorption capacity. The adsorption amount of the three kinds of heavy metal ions increased with the rise of pH. This paper also studied the kinetic characteristics of the three kinds of heavy metal ions on hydroxyl-Al pillared montmorillonite,and found that Elovicb equation and One-level kinetic equation can describe the kinetic characteristics very well.更多还原